Swaging head assembly

Abstract

An apparatus for imparting a predetermined profile to one end of a workpiece mounted on a main axis. The apparatus comprises a rotary head mounted for rotation about the main axis and at least two fingers pivotally mounted to the rotary head for pivotal movement between an open position and a closed position. Each finger has a shaping tool adapted to engage the workpiece, and a cam mounted between said at least two fingers in riding contact with an inwardly facing cam surface thereof to pivot the fingers between said open and closed positions upon relative axial movement between the rotary head and the cam.

1. A swaging head assembly for performing a shaping operation at one end of a workpiece mounted on a main axis, the swaging head assembly comprising: a hollow driving shaft rotatable about the main axis, a rotary head member mounted to the hollow driving shaft, at least two pivotal fingers pivotally mounted at an intermediate location between opposed first and second ends thereof to the rotary head member, each pivotal finger carrying a shaping roller adapted to be engaged in rolling contact with the workpiece, a linearly reciprocable shaft concentrically received in the hollow driving shaft, and a cam mounted to said linearly reciprocable shaft inwardly of said at least two fingers for pivoting the fingers between an open position and a closed position as a result of a relative axial displacement between the rotary head member and the cam. 
   
   
     2. The swaging head assembly as defined in  claim 1 , wherein said rotary head member is linearly displaceable by said hollow driving shaft. 
   
   
     3. The swaging head assembly as defined in  claim 1 , wherein said shaping rollers are carried at said first end of said at least two fingers, and wherein said second end of said fingers defines an inwardly facing cam surface for engagement with the cam, and wherein the point of pivot of each of said at least two fingers is axially spaced from said cam surface. 
   
   
     4. The swaging head assembly as defined in  claim 1 , wherein said rotary head member has a localization aid adapted to abut an end surface of the workpiece to axially locate the shaping rollers at a predetermined distance from the end surface of the workpiece. 
   
   
     5. A swaging head assembly as defined in  claim 1 , wherein spring means is mounted outwardly of the fingers to normally bias the fingers to the open position thereof. 
   
   
     6. An apparatus for imparting a predetermined profile to one end portion of a workpiece mounted on a main axis, the apparatus comprising a rotary head mounted to a hollow driving shaft for rotation about the main axis, at least two fingers pivotally mounted to the rotary head for pivotal movement between an open position and a closed position, each finger having a shaping tool adapted to engage the workpiece, a linearly reciprocable shaft concentrically received in the hollow driving shaft, and a cam mounted to the linearly reciprocable shaft between said at least two fingers in riding contact with an inwardly facing cam surface thereof to pivot the fingers between said open and closed positions upon relative axial movement between the rotary head and the cam. 
   
   
     7. An apparatus as defined in  claim 6 , wherein said shaping tools are carried at a first end of said at least two fingers, and wherein each of said fingers is provided at a second end thereof opposite said first end with an inwardly facing cam surface for engagement with the cam. 
   
   
     8. A swaging head assembly for producing an annular groove in one end portion of a workpiece mounted to a hollow driving shaft on a main axis, the apparatus comprising a rotary head mounted for rotation about the main axis, said rotary head being movable axially towards and away from the workpiece along said main axis, at least two fingers pivotally mounted to the rotary head, each finger having first and second opposed ends and an intermediate point of pivot therebetween, said first end having a cam surface on an inwardly facing side thereof, each finger carrying a groove forming roller at said second end thereof, said groove forming rollers being adapted to engage the workpiece when the fingers are closed against the one end portion of the workpiece, and a cam mounted internally of said rotary head between said first end of said at least two fingers for engagement with said cam surface thereof to pivot said fingers about said intermediate point of pivots between said open and closed positions upon relative axial movement between the rotary head and the cam, wherein the cam is mounted internally of said rotary head at one end of a linearly reciprocable shaft, said linearly reciprocable shaft being concentrically received in the hollow driving shaft of said rotary head member.